PyGTK will be phased out with the transition to GTK+ version 3 and be replaced with PyGObject,[4][5] which uses GObject Introspection to generate bindings for Python and other languages on the fly. This is expected to eliminate the delay between GTK updates and corresponding language binding updates, as well as reduce maintenance burden on the developers.[6]

PyGObject provides a convenient wrapper for use in Python programs when accessing GObject libraries.

Like the GObject library itself, PyGObject is licensed under the GNU LGPL, so it is suitable for use in both free software and proprietary applications. It is already in use in many applications ranging from small single-purpose scripts to large full-featured applications.

PyGObject can dynamically accesses any GObject libraries that use GObject Introspection. It replaces the need for separate modules such as PyGTK, GIO and python-gnome to build a full GNOME 3.0 application. Once new functionality is added to GObject library it is instantly available as a Python API without the need for intermediate Python glue.

A good introduction to PyGObject is not found in the GNOME wiki but here: